thursday the troops used helicopters to fly in search of taliban fighters. the current plan is for afghan forces to take over the country's security by the end of 2014. >>> two people were killed when their plane crashed into an unoccupied hospital building in watsonville, california. the plane struck the building shortly after takeoff last night, apparently as the pilot was trying to clear the line of fog. watsonville is 90 miles south of san francisco. >>> economists look for positive unemployment numbers being released today. >>> plus it's raining? no, not quite, it's pouring in denver, a sudden cloud burst swamps the mile high city. >>> first, scott pelley has a preview of tonight's "cbs evening news." >> from nasa's first mission to now the final shuttle flight, we'll look at how cbs news and walter cronkite covered the space race for the last 50 years, that story tonight on the "cbs evening news." we all have internal plumbing. but for some of us with overactive bladder, our pipes just don't work as well as they should. sometimes, i worry my pipes migh